Github user vanzin commented on a diff in the pull request:
https://github.com/apache/spark/pull/19272#discussion_r146946137
--- Diff:
resource-managers/mesos/src/main/scala/org/apache/spark/scheduler/cluster/mesos/MesosCoarseGrainedSchedulerBackend.scala
---
@@ -213,6 +216,24 @@ private[spark] class
MesosCoarseGrainedSchedulerBackend(
sc.conf.getOption("spark.mesos.driver.frameworkId").map(_ + suffix)
)
+ // check that the credentials are defined, even though it's likely
that auth would have failed
+ // already if you've made it this far
+ if (principal != null && currentHadoopDelegationTokens.isDefined) {
+ logDebug(s"Principal found ($principal) starting token renewer")
+ // The renewal time is ignored when getting the initial delegation
tokens
+ // (CoarseGrainedSchedulerBackend.scala:getHadoopDelegationCreds),
so we get the renewal
+ // time here and schedule a thread to renew them.
+ val renewalTime =
--- End diff --
But do note that you still can't start the token renewer automatically,
since YARN still has its own renewer and things would get mixed up.
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